- Disc wheel measuring tool kit shows you when wheel and inner outer caps nuts are worn out.
- Provides a guide to visually detect excessive wear in .875R spherical chamfers of bolt holes in disc wheels.
- Designed for use with stud piloted steel wheels which have .875 spherical bolt hole 3/8? to 1/2? disc thickness.
- Use only with Stud Piloted Steel Wheels.
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